<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- Tab栏目 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex" @tab-click="tabClicked" :before-leave="beforeTabLeave">
          <!-- 基本信息表单区域 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <!-- 级联选择器 -->
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader clearable v-model="addForm.goods_cat" :options="cateList"
                :props="{ expandTrigger: 'hover',value: 'cat_id',label:'cat_name',children:'children' }"
                @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品参数表单区域 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :key="item.attr_id" v-for="(item) in manyTableData" :label="item.attr_name">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" :key="index" v-for="(cb,index) in item.attr_vals"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品属性表单区域 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="(item) in onlyTableData">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品图片 -->
          <el-tab-pane label="商品图片" name="3">
            <el-upload :headers="headerObj" :on-success="handleSuccess" class="upload-demo" action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 商品内容 -->
          <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
              <el-button type="primary" class="btnAdd" @click="Add(addForm)">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片对话框 -->
    <el-dialog class="imgShow" title="图片预览" :visible.sync="previewVisible" width="50%">
        <img :src="previewPath" alt="">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data () {
    return {
      // 步骤条默认步骤
      activeIndex: '0',
      // 添加商品的表单
      addForm: {
        goods_cat: [],
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 图片的数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [{
          required: true,
          message: '商品名称不能为空',
          trigger: 'blur'
        }],
        goods_price: [{
          required: true,
          message: '商品价格不能为空',
          trigger: 'blur'
        }],
        goods_number: [{
          required: true,
          message: '请填写商品数量',
          trigger: 'blur'
        }],
        goods_weight: [{
          required: true,
          message: '请填写商品重量',
          trigger: 'blur'
        }],
        goods_cat: [{
          required: true,
          message: '请选择商品分类',
          trigger: 'blur'
        }]
      },
      // 商品分类列表
      cateList: [],
      //   动态参数列表数据
      manyTableData: [],
      //   静态属性列表数据
      onlyTableData: [],
      //   这是图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //   预览图片
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 1、获取商品数据列表
    async getCateList () {
      const {
        data: res
      } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类数据列表失败')
      this.cateList = res.data
    },
    //   级联选择器发生变化触发的函数
    handleChange (value) {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) this.addForm.goods_cat = []
    },
    // tab标签页发生切换就触发的函数
    beforeTabLeave (activeName, oldActiveName) {
      console.log(activeName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品的分类')
        return false
      }
    },
    // 被选中的Tab项
    async tabClicked () {
      // console.log(this.activeIndex)
      // 数值1：访问的是动态参数面板
      if (this.activeIndex === '1') {
        // console.log(this.addForm.goods_cat[2])
        const {
          data: res
        } = await this.$http.get('categories/' + this.cateId + '/attributes', {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) return this.$message.error('获取参数列表失败')
        // 赋值前把attr_vals从字符串转换为数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })
        this.manyTableData = res.data
        // 数值2： 访问的是静态属性面板
      } else if (this.activeIndex === '2') {
        const {
          data: res
        } = await this.$http.get('categories/' + this.cateId + '/attributes', {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) return this.$message.error('获取静态属性列表失败')
        this.onlyTableData = res.data
      }
    },
    //   处理图片预览
    handlePreview (file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理删除图片的操作
    handleRemove (file) {
      // 获取要删除的图片路径
      const filePath = file.response.data.tem_path
      const i = this.addForm.pics.findIndex(x => {
        x.pic = filePath
      })
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      const picInfo = { pic: response.data.tmp_path }
      console.log(picInfo)
      this.addForm.pics.push(picInfo)
    },
    // 点击确定按钮，调用接口，添加商品
    Add (goodsData) {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写表单内容')
        const form = _.cloneDeep(this.addForm) // 深拷贝
        form.goods_cat = this.addForm.goods_cat.join(',')
        // 处理动态参数和静态属性
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // 调用接口，发起请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加成功')
        this.$router.push('/goods') // 添加成功就跳转到goods
        // console.log(goodsData)
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      } else {
        return null
      }
    }
  }
}

</script>

<style lang="less" scoped>
  .el-checkbox {
    margin: 0 3px !important;
  }
.imgShow {
    img {
        width: 100%;
        height: 100%;
    }
}
.btnAdd {
    margin-top: 15px;
}

</style>
